Browsing by Australian Curriculum Specialist Mathematics

convert sums acosx+b sinxacos⁡x+b sin⁡x to R cos(x±α)R cos⁡(x±α) or Rsin(x±α)Rsin⁡(x±α) and apply these to sketch graphs, solve equations of the form acosx+bsinx=cacos⁡x+bsin⁡x=c and solve problems